Gage por metal-working machines



P. R. HAHNEMANN.-

JGAGE FOR METAL WORKING MACHINES.-

APPLICATION FILED OCT- 30, I918. I

Patented Nov. 1 8, 1919.

UNITED s'r 'rEs PATENT oFFroE.

PAUL R. HAHNEMANN, or sou'rrrrrreron, CONNECTICUT, ASSIGNOR TO THEPEGK,

STOW & WILCOX COMPANY, OF SOUTHINGTON, CONNECTICUT, A CORPORATION OF CONNECTICUT.

GAGE FOR METAL-WORKING MACHINES.

Specification of Letters Patent.

Patented Nov. 18, 19 19.

To all whom it may concern:

Be it known that I, PAUL R. HAHNE- MANN, a citizen of the United States, residing at Southington, in the county of Hartford, State of Connecticut, have invented certain new and useful Improvements in Gages for Metal WVorking Machines, of which the following is a specification.

This invention relates particularly to what is known as the back gage for use in connection with metal shears in order to permit of cutting a number of sheets to the same dimensions. The invention is concerned particularly with mechanism for ad justing the back gage.

In the drawings- Figure 1 is a perspective View of a complete machine equipped with a gage made in accordance with this invention.

Fig. 2 is a top view on a large scale of the gage bracket.

Fig. 3 is a detail View of the adjusting pin.

Fig. 4: is a sectional view taken longitudinally and centrally through one of the gage brackets.

Referring to the drawings-a, denotes generally a shearing machine and 6, denotes generally the back gage which, as is apparent, is supported on the bars 0, 0, proj ecting from the back of the machine in order to permit of this back gage being positioned at different distances from the shears. The gage itself is usually comprised of an iron casting mounted at its ends on brackets 2, 2, which are alike and each comprises a longitudinal bore 12 to receive the bar 0, and a transverse bore 18 which intersects the longitudinal bore and in which is mounted the pin 5, knurled at its central portion as at 6, to engage the underside of the bar. The bore 18 is open at its under side and is of slightly larger diameter than that of the pin 5 to permit the pin to be moved into and out of engagement with the bar 0. The under side of the bore is closed by a plate 7 secured to the bracket by a screw 14. The plate which may be of spring material has a pair of fingers engaging on either side of the knurled portion of the pin so as to maintain the pin resiliently in contact with the bar. It is apparent that as the pin is rotated by its handle 8, the knurled portion engaging the bar will cause the bracket to move along the bar. When the proper adjustment has been secured the bracket may be locked to the bar by the set screw 10, shown in dotted lines in Fig. 2. In order to get a rough adjustment where the brackets are to be slid aconsiderable distance along the bar before a final adjustment is to be made, the portions of the pins 5 in engagement or registry with the fingers 15 of the holding plate are flattened off at one side as indicated at 11. When the pins are turned so that the flattened parts lie adjacent to the holding plates, the pins will drop out of engagement with the bars so that the brackets may be moved freely along the bars for purposes specified.

I am aware that the device is susceptible to modification without departing from the spirit of the invention, and that it may be used on other machines than that with which it is here shown associated.

In accordance with the provisions of the patent statutesI have described the principle of operation of my invention, together with the structure I now consider to represent the best embodiment thereof, but I desire to have it understood that the structure here shown is only illustrative, and that the invention can be carried out by other means.

I claim as my invention 1. The combination with a gage plate and the supports therefor, of a pair of brackets carrying said plate and slidably mounted on said supports, a rotatable pin mounted on each bracket transversely of said supports, means for rotating said pin, and resilient means for holding said pin in engagement with said supports.

2. The combination with a gage plate and the supports therefor, of a pair of brackets carrying said plate and slidably mounted on said supports, said bracket being provided with angularly disposed intersecting bores one below the other, the upper bore being adapted to receive said supports, pins rotatably mounted in said lower bore, and a holding-plate to hold said pins in engagement with said supports, said pins provided with a knurled portion for engagement with said supports.

3. The combination with a gage plate and the supports therefor, of a bracket slidingly mounted on each support, a pin rotatably mounted within said bracket below said support and adapted for engagement therewith, a holding plate to maintain engage ment between said pin and support, and means for disengaging said pin from said support.

4:. The combination with a gage plate and the support therefor, of a bracket slidingly mounted on each support, a pin rotatably mounted within said bracket below said support, a knurled portion on said pin adapted for engagement Withsaid support, a flattened portion on said pin at one side of said knurled portion, and a holding-plate for said pin registering with the flattened portion thereof. 7

5. The combination with a gage plate and a support therefor, of a bracket carrying said plate and slida-bly mounted on said support, said bracket being provided with angularly disposed intersecting bores one above the other, the upper bore being adapted to receive said support and the lower bore having its under side open, a holding plate having a pair of spaced fingers closing the open side of said lower bore, and a pin mounted in said lower bore and engaging the fingers of said plate, said pin having flattened portions registering with the fingers of said plate and a knurled portion between the flattened portions and engaging said support.

PAUL R. HAHN EMANN. 

